Another one bites the dust. That’s the story of Donald Trump’s foreign policy team. In his 22nd month in office, the president is on his third national security adviser and second secretary of state. Now, Trump has to fill yet another national security position: US ambassador to the United Nations.

The resignation of Nikki Haley came as a surprise to everyone, including apparently the secretary of state, Mike Pompeo, and White House staff . While many senior officials leave after two years, the resignation announcement of a cabinet member immediately before midterm elections is rare. Speculation is already rampant: was Haley fed up with the chaos of the Trump administration? Was one of Trump’s daily affronts to basic decency and democratic norms finally too much? Is she planning to run against Trump in the 2020 Republican primary, despite claims to the contrary?

One thing is clear: the Trump administration’s foreign policy is in chaos, and there’s no one minding the store.